What is the file extension type for the hash list files created by FTK Imager?

The correct answer is .csv because FTK Imager generates hash list files in Comma-Separated Values format. This format allows for easy readability and can be opened by various programs such as spreadsheet applications or text editors. A .csv file structure can efficiently represent the hash values along with associated metadata, making it suitable for data analysis and further forensic investigation.

The other file extension types do not correspond with hash list files generated by FTK Imager. For example, .txt files are used for plain text documents and would not typically structure the data in a way that separates values like a CSV file does. The .hash extension implies a specific type of file that is not standard; while hashes can be represented in various formats, FTK uses .csv for this specific purpose. Finally, .img is used for disk image files and would not be suited for representing hash lists.